PDF malware analysis — malicious · 1eeec9d8bf5a075f

MALICIOUS

PDF

118.6 KB

MD5: d061e5a37765efe3931f413af7a3e6f6 SHA-1: 8ef2d6caee553e28a2f41849dd006ac2985f53a0 SHA-256: 1eeec9d8bf5a075f9c5d9d623870274076683d200531794a35abc037a3e63002

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file contains embedded JavaScript, which is heavily obfuscated and uses eval() calls. Heuristics indicate a large comment-padded JavaScript eval stager, suggesting it's designed to download and execute a second-stage payload. ClamAV detection confirms its malicious nature, identifying it as Pdf.Exploit.Agent-36086. The document body is unreadable, but the presence of JavaScript and the ClamAV signature point towards an exploit attempt.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `ddcf746f7e94b3e5e5ed570d5604d7f0b5af958c1970eef64bf756591e75e995`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627224 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

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